Starting today, Microsoft is pushing out the first major update to its Windows Phone operating system, to 98% of Windows Phone users (the other two will just have to wait). It's loaded with changes and improvement, and this time around, the rollout process appears to be pretty smooth. Another nice touch: Mango beta users (right here) will get the update to the final version like everybody else - you won't have to downgrade to NoDo as previously stated.